YouTube celebrated its 10th anniversary back in February.  It was founded on February 14th, 2005.  But the first video ever was posted 10 years ago today.  It's an 18-second clip of one of the co-founders standing in front of an elephant pen at the San Diego Zoo.  It's called "Me at the Zoo." YouTube now has more than a billion users, and 300 hours of footage gets uploaded every minute.

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